I am a physician with a hobby interest in communication electronics.
I am having a difficult time understanding the concept of frequency modulation (FM). If a voltage-controlled oscillator is used to alter the carrier frequency, i.e. the frequency of the carrier will vary according to the AMPLITUDE of the modulating sgnal, how can the resultant signal accurately differentiate a low volume frequency (low voltage amplitude), from a modulating frequency of the exact same frequency but with a higher voltage amplitude (i. e. higher volume)? It seems that the resulting carrier frequency change will be of higher frequency in the latter case.
Could anyone help with the concept I am missing?
Thank you very much!
D. Peter Van
I am having a difficult time understanding the concept of frequency modulation (FM). If a voltage-controlled oscillator is used to alter the carrier frequency, i.e. the frequency of the carrier will vary according to the AMPLITUDE of the modulating sgnal, how can the resultant signal accurately differentiate a low volume frequency (low voltage amplitude), from a modulating frequency of the exact same frequency but with a higher voltage amplitude (i. e. higher volume)? It seems that the resulting carrier frequency change will be of higher frequency in the latter case.
Could anyone help with the concept I am missing?
Thank you very much!
D. Peter Van